You can change the primary email address of your account when you choose 'Personal settings' from the menu in the right upper corner. In the 'Profile' section, find 'Email addresses' and click 'Add email'. You'll then receive a confirmation email on the new address that you entered. Follow the link in the email to verify the address. After that, go to 'Personal settings' again and choose 'Make primary' for the added address.
Updated on: 19 / 03 / 2021